tests: use 'hghave unix-permissions' for tests that really use chmod

chmod of helper scripts is not included.

tests that exercise the x bit in the file system uses 'hghave execbit'.

tests/test-clone-failure.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" unix-permissions || exit 80
+
 No local source
 
   $ hg clone a b

tests/test-command-template.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" unix-permissions || exit 80
+
   $ hg init a
   $ cd a
   $ echo a > a

tests/test-convert.t

@@ -1,3 +1,4 b''
+  $ "$TESTDIR/hghave" unix-permissions || exit 80
 
   $ cat >> $HGRCPATH <<EOF
   > [extensions]

tests/test-eol.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" unix-permissions || exit 80
+
 Test EOL extension
 
   $ cat >> $HGRCPATH <<EOF

tests/test-journal-exists.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" unix-permissions || exit 80
+
   $ hg init
   $ echo a > a
   $ hg ci -Am0

tests/test-keyword.t

@@ -1,4 +1,4 b''
-  $ "$TESTDIR/hghave" symlink || exit 80
+  $ "$TESTDIR/hghave" symlink unix-permissions || exit 80
 
   $ cat <<EOF >> $HGRCPATH
   > [extensions]

tests/test-largefiles.t

@@ -1,4 +1,4 b''
-  $ "$TESTDIR/hghave" symlink || exit 80
+  $ "$TESTDIR/hghave" symlink unix-permissions || exit 80
 
   $ cat >> $HGRCPATH <<EOF
   > [extensions]

tests/test-lock-badness.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" unix-permissions || exit 80
+
   $ hg init a
   $ echo a > a/a
   $ hg -R a ci -A -m a

tests/test-permissions.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" unix-permissions || exit 80
+
   $ hg init t
   $ cd t
 

tests/test-repair-strip.t

@@ -1,3 +1,4 b''
+  $ "$TESTDIR/hghave" unix-permissions || exit 80
 
   $ echo "[extensions]" >> $HGRCPATH
   $ echo "mq=">> $HGRCPATH

tests/test-tags.t

@@ -1,3 +1,5 b''
+  $ "$TESTDIR/hghave" unix-permissions || exit 80
+
 Helper functions:
 
   $ cacheexists() {